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High Amp Alternator?

Discussion in 'Truck & Equipment Repair' started by Mark13, Dec 30, 2009.

  1. Mark13

    Mark13 PlowSite Fanatic
    Messages: 5,737

    The 120 amp alternator on my 98 has been making some cool noises the last few days upon start up when cold and the first few minutes it is running. I've also noticed the volt gauge not showing electrical power recovering as quick as it used to while plowing. So I'm starting to think it's slowly kicking the bucket. I would like to upgrade to a higher amp alternator, but more specifically one that puts out a ton of amps at idle. Since doing short pushes with low engine rpms is when I really notice my volt guage getting pretty low. Anyone have a brand they would like to recommend?

    I'm also running dual 800cca battery's that are 2-3yrs old.

    Thanks, Mark.
     
  2. elite1msmith

    elite1msmith 2000 Club Member
    from chicago
    Messages: 2,762

    you can try AGS off of 31, iv had both good and bad luck with them tho. they will build it to what ever you want
     
  3. erkoehler

    erkoehler PlowSite Veteran
    Messages: 3,270

    Call DC Grove Electric in Fox Lake, IL. He does all the alternators we need built/re-built. Does great work.
     
  4. turb0diesel

    turb0diesel Senior Member
    Messages: 181

    my alternator went out on the 26th when we got 10+inches
    i jumped this girls car the day before and that was what f`d it up
    i got a duralast for 89.99 with lifetime warranty
     
  5. elite1msmith

    elite1msmith 2000 Club Member
    from chicago
    Messages: 2,762

    oddly enough i have heard of a few newer vehicals that claim you should not jump. - weird i know, but doesnt surpise me
     
  6. theplowmeister

    theplowmeister 2000 Club Member
    from MA
    Messages: 2,552

    Classic symptoms for a bad belt.

    Usually alt work or not (before you all jump on me with "well I had one that..." I said USUALLY)
     
  7. theplowmeister

    theplowmeister 2000 Club Member
    from MA
    Messages: 2,552

    NOT... unless you you hooked it up wrong.
     
  8. grec-o-face

    grec-o-face Senior Member
    Messages: 485

    +1 Agreed!!!
     
  9. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    Mark - I put a 155 amp unit from Napa on my 97. It has worked well so far. Don't buy an AZ cheapie, that will not last. I used one for a half a storm. It smelled like it was going to catch on fire. It was so bad I didn't dare to finish the storm with it. I kept if for a spare, put in the Napa unit. Make sure you get the HO charge kit too.
     
  10. Mark13

    Mark13 PlowSite Fanatic
    Messages: 5,737

    I need to replace an idler pully so I'll check my belt then. The belt isn't that old but who knows.

    And I definetly won't be going with an AZ product, the local AZ and I are not good friends. I'd go with Napa as first choice or Oreilly's as 2nd.
     
  11. ProSeasons

    ProSeasons Senior Member
    Messages: 624

    http://www.alternatorparts.com/ad_alternator_order_page.htm
    http://www.alternatorparts.com/cs130d_cs144_trk_suv_upgrade.htm
     
  12. secret_weapon

    secret_weapon Senior Member
    Messages: 437

  13. the new boss 92

    the new boss 92 2000 Club Member
    Messages: 2,989

    how does it hold up to major amp draw such as a plow or stero? do you drive the truck daily or is it just a plow truck? im tinking about picking up the 200 amp alternator in a couple days when i collect my cheack.
     
  14. secret_weapon

    secret_weapon Senior Member
    Messages: 437

    It's been good so far, got it last year. My truck sits most of the summer, dedicated plow truck. I'm very happy with the output!
     
  15. Dissociative

    Dissociative 2000 Club Member
    Messages: 2,066

    i had a 250amp made at a place out in belvidere i think....it may ahve been ags.....i amnot sure..

    My buddy also made me an overdrive pully for it.....so i get 70 amps at idle.
     
  16. the new boss 92

    the new boss 92 2000 Club Member
    Messages: 2,989

    did you buy the inline fuse kit and upgrade you charge wire to 4awg? did you also put the inline fuse in there?
     
  17. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    4 gauge is kinda light for a 200+ amp alternator. 2 gauge welding wire is the minimum, really. Don't forget to include the same size ground wire to run a ground directly from the battery to the alternator housing.
     
  18. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Use the search function on the blue line above. Search: Charging, Low power, Duel Batteries. There is many hours of reading there. It's been beat to death here many times.

    Keep in mind an Alternator only puts out 1/3 of it's rated amps at idle.
    An Automotive component rebuild shop can upgrade you stock alternator for $1.50 an amp. If space is an issue this is the way to go.
    The Internet has sites that sell upgrade alternators, you have to upgrade the size of wire to the batteries.
    Make sure all your connections are clean and dielectric grease is put on to protect them.
    Do the same to ALL the grounds on the engine and frame.
    You can buy the front and back bearings,brushes and voltage regulator for most alternators at part stores.
    Make sure the pulley on the belt tension-er is not worn out. Mine was made of plastic it was worn so thin it would let the belt move around.
     
  19. secret_weapon

    secret_weapon Senior Member
    Messages: 437

    I used 2 awg for all wiring. I did not use the inline fuse, that's just one more sketchy connection to worry about.
     
  20. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    So you have no fuse protection between your alternator and battery?